发明名称 |
Metod för att avlägsna en hydroxiskyddsgrupp från penemer |
摘要 |
<p>The present invention relates the removal of t-butyldimethylsilyl protecting groups in the preparation of penems which are useful antibiotics. The invention provides a process for preparing a compound of the formula I: <IMAGE> I wherein R is a free or protected hydroxy or amino group or an alkoxy, acyloxy or an optionally substituted carbamoyloxy group, and R1 is selected from: a) hydrogen; b) a C2-C4 alkenyl group; c) a p-NO2 benzyl group; d) a linear or branched alkanoyloxy C1-C2 alkyl group; and e) (2-oxo-1,3-dioxolen-4-yl)methyl optionally substituted by C1-C4 alkyl at the 5-position or a pharmaceutically acceptable salt thereof, which process comprises reacting a compound of the formula II: <IMAGE> II</p> |
申请公布号 |
FI940101(A0) |
申请公布日期 |
1994.01.10 |
申请号 |
FI19940000101 |
申请日期 |
1994.01.10 |
申请人 |
FARMITALIA CARLO ERBA S.R.L. |
发明人 |
BEDESCHI, ANGELO;ZARINI, FRANCO |
分类号 |
C07D499/897;C07D499/88;(IPC1-7):C07D |
主分类号 |
C07D499/897 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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